kuroko no basketMedaka Box has a few sport-ish scenes, mostly in the earlier episodesDidn't a new Prince of Tennis season come out sometime recently-ish?Haruhi has a baseball episodeAnd Death Note has that epic Tennis match xD

I'm surprised nobody said this already but, Inazuma Eleven. Soccer Show. There was also a brutally hilarious Rugby episode of Full Metal Panic Fummofu!?! (spelling?) And Kenichi the Mightiest Disciple.